Radial pitman for multiple-cylinder engines.



G. B; REDRUP. RADIAL PITMAN FOR MULTIPLE CYLINDER ENGINES. APPLIOA'I' ION FILED JUNE 15, 1911.

1 s 3 6, 3 37 Patented Aug. 20, 1912.

8 SHEETS-SHBBT 1.

LE3 I 1.4.. Z1421 G. B. REDRUP. I RADIAL PITMAN FOR MULTIPLE CYLINDER ENGINES.

7 APPLICATION FILED JUNE 15, 1911. l ggfi ggy Patented Aug.20,1912.

2 SHEETSSHEET 2.

CHARLES BENJAMIN REDRUI, OF CARDIFF, ENGLAND.

RADIAL PITMAN FOR MULTIPLE-CYLINDER ENGINES.

Specification of Letters Patent.

Patented An. 20, 1912.

Application filed June 15, 1911. Serial No. 633,333.

T 0 all whom it may concern -Be it known that 1, CHARLES BENJA IN Rnnnur, a subject of the King of England, residing at Cardifi, county of Glamorgan, \Vales, England, have invented certain new and useful Improvements in Radial Pitmen for Multiple-Cylinder Engines, of which the following is a specification.

This invention is for improvements in or relating to multiple cylinder enginesand has particular reference to the type of en-' gine in which a series of cylinders are d15- posed radially around the crank-shaft, the piston or connectingro'ds of several cylinders being engaged with the same. crankin. p According to the present invention there is employed with two or more piston or' connecting-rods and a crank-pin common to all the rods a hinged strap that extends around the whole or part of the crank-pin and locks lateral tongues on one or more of the rods between it and the crankpin;

With the hinged strap a master rod may be employed whose end encircles the crankpin and lies'between it and the ends of the rods held in place by the hinged strap.

In the accompanyin drawings which illustrate one method 0 carrying out this invention :--Figure 1 shows a crank and the rods connected thereto with part of the locking-device in section: Fig. 2 shows part of a crank-case broken away .and the'crank and associated parts in section on the line" 2-2 of Fig. 1, and Fig. 3 is a erspective view of one of the piston-rod end shown in Figs. 1 and 2. l

- Like letters indicate like parts throughout The crank-case of any convenient construction and form no part of the present invention. The englne indicated by these parts in Fig. 2 is pro vided with tencylinders and a two-throwcrank having five cylinders allotted to each.

The crank pin B has a surrounding bushing the piston rods 0 hereinafter B and one of referred to as the'master-rod, has a big-end C that takes over the bushed crank-pin and In the drawings for entirely encircles it. the sake of clearness the big-end C is shown in the form of an eye but in practice it is split in two so that it canvbe attached to the crank-pin in the usual manner. Each of the other piston rods D has at its end a T-piece or double tongue D 3 these T-pieces or A and cylinders A may. be

(. 'against which they bean, What I. claim asv my 'to secure' v 4 Thev combination with j' masterhkconnecting i rod h sleeve projecting at Teac tongues project laterally from opposite sides of the piston-rods and extend along in the direction of the axis of the crank-pin. The

outer surface of the big-end of the masterrod is curved to a radius struck from the axis of" the crank-pin and the inner and outer surfaces of the tongues D are all curved'tof radii struck-from the same center.

Surrounding" the tongues-of, the pistonrods D and retaining these .in'close engagement with the big-end of the master-rod C and thus with the crank-pin-itse'lf is a double strap E, E. The double strap is-divided transversely and the two parts are connected together byhinges e having'a common pivot e. On the other side of the strap the parts E, E are connected together by yoke pieces E E which are shaped to embrace the master-rod C. These yoke portions may be made integral with the parts' E. E and the dimensions of the strap are such relatively 'to the parts it encircles that when in posi- 7 tion the ends of the yokes rest againsteach other and are secured together by. bolts and nuts Ezg I I It will be seen from. the above descri tion that by removing the bolts and nuts 4 the strap can be opened out upon its hinge e, e and all the rodsDireleasedzfrom the crankm. drawings one j,su"chi}i:rod.j; only may} be employed together with ana'ster-rod; the invention s 'however islmore I particularly, applicable 1 to engines having "more than two rodsand a master rod is preferably employed therewith.

, It will be seen that by means of theannularlmember orystrap E the rodsD are not only gheld-in'right relation to the crank-pin .but can move circumferen'tially' between the ring or strap andthe end of the master-rod Letters Patent isi- 1 g .a c'r'ankg pin and a a; ybearin side hereof and '=a,". plurality of mg: rods each havencircling the crank *pi radially-disposed connect ing arc-shaped tongues'jprogecting on each I 11o with the projecting ends of-the bearing-- side thereof; andtwo spaced straps for retaining the tongues in rotatable engagement sleeve, said straps being each divided long I mast'errod or' twoor, more such rods may be uf Q cd no V a 10onvention; and desire tudinally into two parts, said parts being hinged together at one end on a common pivot, and said straps being connected together at the other end by yokes encircling 5 the master connecting rod, and said connecting rods passing through the space between said straps, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witneses.

CHARLES BENJAMIN REDRUP;

Witnesses:

AL M. HAYWARD, HARRY B. BRIDGE. 

